The guard method should not just pass the second item as a string.

If you want to use the guard method as instructed in the readme, you will actually pass the string “false” to the oauth2 method, iso actually passing `false`. As this is a user added string, we should just instance_eval it.

This is clearly made to be used with wine_bouncer, but in the current implementation I so no way possible to actually pass false (so make wine_bouncer see this as public iso the scope :false)

Author: tim-vandecasteele

CHANGELOG.md

@@ -9,6 +9,8 @@
 
 #### Fixes
 
+* [#562](https://github.com/ruby-grape/grape-swagger/pull/562): The guard method should allow regular object methods as arguments - [@tim-vandecasteele](https://github.com/tim-vandecasteele).
+
 * Your contribution here.
 
 ### 0.25.3 (December 18, 2016)

lib/grape-swagger/doc_methods.rb

@@ -43,7 +43,7 @@ def setup(options)
         end
       end
 
-      send(guard.split.first.to_sym, *guard.split(/[\s,]+/).drop(1)) unless guard.nil?
+      instance_eval(guard) unless guard.nil?
 
       output_path_definitions = proc do |combi_routes, endpoint|
         output = endpoint.swagger_object(

spec/swagger_v2/guarded_endpoint_spec.rb

@@ -36,8 +36,8 @@ def before
     context.protected_endpoint = context.options[:route_options][:auth].present?
 
     return unless context.protected_endpoint?
-    scopes = context.options[:route_options][:auth][:scopes].map(&:to_sym)
-    authorize!(*scopes) unless scopes.include? :false
+    scopes = context.options[:route_options][:auth][:scopes]
+    authorize!(*scopes) unless scopes.include? false
     context.access_token = env['HTTP_AUTHORIZATION']
   end
 end